I did two group classes and one semi-private day, spanning from 2011 through 2017. I imagine that this serves as an endorsement?

Ernest gives a very good class. First day lecture is longer than most classes but beyond that I've no criticism. These days there are way too many pistol instructors who can't really shoot, or teach, of both. His national champion creds (with a recent GM ranking confirmation) take care of the shooting part bonafides, and he does deliver his material. He is also a rare bird these days who not only knows how to shoot DA/SA guns but prefers them to others. He is a nice dude too, although that shouldn't matter. Hope this helps.

Quite a few years ago, he taught a class at an LE firearms instructor seminar (IALEFI) in NJ. I've been following him ever since and I would not hesitate to take any course he teaches.

Steve "The Marines I have seen around the world have, the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps." Eleanor Roosevelt, 1945